Specification:

Operating current:180mA S/R:90dB

Audio frequency response:20-20KHz

Voltage:+5V

Output power:2.5W*2

Power charger:

When the machine is power off ,you can charge it 2-3 hours by the charger until the green light change to orange,If the power switch is off when charge power,then the indicator ligth will turn red after finishde.Should charge power 12 hours for the first three times.